I really enjoy Steve Losh's blog. I found his post[0] on returning to Vim during a formative part of my own career, and it really influenced my adoption of vim. He's got a great guide[1] on getting mutt set up on OS X for command-line email. And the minimalistic design suits my personal aesthetic. He wrote a post[2] on the design of it, like using the ratios of the dominant 7th chord, implementation of print accessibility/context headers, and even credits his inspirations.
[0]: http://stevelosh.com/blog/2010/09/coming-home-to-vim/
[1]: http://stevelosh.com/blog/2012/10/the-homely-mutt/
[2]: http://stevelosh.com/blog/2010/09/making-my-site-sing/